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 SYMBOLS QUIZ Question #1a: In this Periodic Table, what is the color of the symbols for copper (Cu), silver (Ag), and gold (Au)? Question #1b: What is the color of the elements copper, silver, and gold? Question #2: In the image is the numeral 2222. Each of these numerals look the same; however, they all have different values. How many times larger is the value of the left "2" compared to the right "2"? (Don't count them. There are 2000 dots for the left 2) Symbols versus the real thing Answer True or False to the following statements; 3a. Cl is chlorine. 3b. Cl is the symbol for chlorine. 3c. v is the top half of X. 3d. The letter grade of "A" means you know the subject. 3e. The letter grade of "A" means you got an "A" for the class. 3f. "NaCl" (symbol for table salt) tastes salty. 3g. The substance represented by NaCl tastes salty. 3h. This numeral 9 is bigger than this numeral 8. 3i. The number 9 is bigger than the number 8. 3j. This numeral "3" is bigger than this numeral "9". Questions #4: What is the difference between these two "formulas" a. H2O b. H20 Bonus question: Which one is the correct formula for water (a or b)? Question #5: A milligram (thousandth of a gram) is abbreviated as "mg." "m" also is used to represent the spin of an electron. A meter is also abbreviated as "m". How are you going to know which "m" they are talking about? Question #6: #6a: The numeral 8 turned on its side becomes what symbol? #6b: How many times larger did the new symbol become? #6c: How many times larger than the number 8 is the number represented by this new symbol? Question #7: You are asked, "How tall are you?" and you must answer without the use of symbols (words or numerals). How could you do that? (hint: the solution is easy) Question #8: One of the below masses represents the mass of the Earth. The other represents the mass of 15 electrons. Even though the difference in mass is huge, what is the only difference in the symbols that represent these masses? 6 x 1027 g 6 x 10-27 g Question #9: In the bottom just right of center are 3 letters, DMS. A Google search finds too many Web pages. In Wikipedia a search for DMS finds about 50 articles ranging from Dealership Management System to Dickerson Middle School; fortunately, Wikipedia groups these articles and one grouping called "In Science" we find a chemistry entry called Dimethyl Sulfide. Now we know what the DMS stands for. Here is the link to that article: http://en.wikipedia.org/wiki/Dimethyl_sulfide One of the labs in CHM107LL involves boiling red cabbage. I've had a few students complain about the smell of cooked cabbage. Read the dimethyl sulfide article in Wikipedia and report what is responsible for the unpleasant smell when cabbage is cooked and also report what other food contains dimethyl sulfide. <-CHM130 Home Page

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